Apparatus for purifying and reheating furnace-gases.



PATENTED 001?. 16, 1906.

D. & D. D. LAMOND. APPARATUS FOR PURIFYING AND REHEATING FURNACE GASES.

APPLICATION FILED APR-9.1904.

l'm/en'rorg mtnesses r? a. Q

No. 833,467. PATENTED 0017116, 1906.

D. & D. 13. LAMOND.

APPARATUS FOR PURIPYING AND REHEATING FURNACE GASES.

APPLICATION FILED APR.9.1904.'

2 SHEETS-$115M 2.

m'tnemes, lrzzerzzom v $Q 42%. ,(Ma 455-544 UNITED STATES PATENT clarion DAVID LAMOND, or PITTSBURG, ANDDAVIQD. L Moivn or ALLE- GHENY, PENNSYLVANIA.

- APPARATUS FOR PURIFYINGAND REHEATING FURNACE-GASES.

Specification of Letters Patent Pitaout. a, 1906 Application filed April 9, 1904. Serial No. 202.379.

To all who'm, it may concern:

Be it known that we, DAviD LAMONT), re

siding at Pittsburg, and DAVID D. LAMOND,

residing at Allegheny,in the county of Alleg'heny and State of Pennsylvania, citizens of the United States, have invented certain for Purifying and new and useful Iin rovements in Apparatus eheating Blast-Furnace Gases, of which the following is a specifica tion, reference being had therein to the ac comlplanying drawings.

,T 's invention relates, to purifying and reheating blast-furnace gases; and the object thereof is to provide improved apparatus for utilizing heat radiated from the impure gas for reheating the gas after it is purified and before it passes to the furnaces, stoves, &c.,

for use as fuel, thereby feeding the purified gas at substantially the temperature at .which it left the blast-furnace and greatly increasing its efficiency without the employment .of special regenerating apparatus.

- In the accompanying drawings, Figure 1 is a vertical sectional view of apparatus constructed in accordance with our invention. Fig. 2 isa top plan view, partly in section, of the initial purifying-chamber shown'i'n con nection with the dust-catcher. Fig. 3 is a sectional plan view on line 3 3 of Fig. 1. Fig. 4 is a top plan view of the gas-washershown in connection with the next adjacent purify-' ing-chamber, which is shownin sectiontaken Fig. 5 illustrates a modification.

In the embodiment of the invention herein disclosed we have shown three relatively large stove-like settlingchambers 2, 3, and 4,

connected in series by horizontal pipes 5, the

latter being preferably arranged out of horizontal line, so as to make a circuitous passage for the as, These chambers have the usual bell an hopper bottom construction 6 for.

the accumulation and discharge of impurities which separate by gravity from the gas.

Each of chambers 2, 3, and 4 is surrounded and inclosed by an outer wall 7, which is separated sufliciently from the inner chamberwall to form a surrounding cavity or flue 8. The lower portion of this cavity is horizontally continuous or uninterrupted, as shown in Fig. 1 and more clearly in Fig. 4, while the u per portion thereof is of vertical-flue or checker formation, as shown at 9, Fig. 3.

The upper ends of-spaces surrounding chambers 4 and 3 are connectedby elbow 10,- while the lower ends T thereof; surrounding chambers 3 and 2 areconnectedibyduct 11. The upper portion oftheinitial; chamber 2 is connected by pipe 12-with the-dust-catcher or down-comer 13 of the blastrfurnace. (Not shown.) Chamber 4 is connected-byduct 14 with the lower portion-,ofolt-he .11 right gaswasher 15, and the upper endfoft e latter is connected by verticalpi e 'l-fi with-the lower end of cavity 8 surroun ing chamb er4 In operation the blast-furnace gas passes directly from the dust-catcher13 into the up-- per end of chamber 2 and/from thence suc cessively through pipesf) into-chambers 3 and '4. In passing through these chambers the gas expands and the :heat, thereof is absorbed by the chamber-walls; thereby heating cavities or flues 8 toathe temperature of the gas as it leaves the blastefurnace. The passage of the gas through-thesechambers is comparatively slow, s ;that-. .the're;ris ample time for it to give ofl' its;heat: and also ample space in which it may expandandrelease the heavier impurities which collect in the hopper-bottoms 6. By the time the gas passes from chamber 4 into washer 15 it is comparatively cool and relatively cleanq :In' its upward passage through the washer the-gas encounters downward sprays ;ofigwater discharged from transverse "perforated v pipes 17 and all of the dust and lighterimpurities are removed. The pure and eoolgas passesfrom the washer downward/through pipe 16 and into the lower end of spaCjeSsurrounding chamber 4. Pipe 16 extends'below its. connection 16 with saidspace, as indicated at 18, and forms a trap for collecting moisture carried over from the washers. The gas passes upward throng-hZ this sp'ace, ,8 and through elbow 10 into the corresponding space surrounding chamber3; andfrom the latter through duct 11--into the spacesurrounding initial chamber, 2,;,it's course, being in direction reverseto that followed by it in flowing through the purifying apparatus. The pure gas is thus thoroughly heated, its temperature when it enters bustle-pipe 19, at the upper end of chamber 2, being substantially the same as that of the imure gas entering said chamber from the ust-catcher. This bustle-pipe has a series of connections 20, through which the gss en ters, and pipe 21 operates to pass theseme to the steam boiler furnace, hdt-blast stoves, er wherever required for fuel use.

In some instances the gas may be snificiently purified by its passage through. the settling-chambers, in which event the washer may be eliminated and the outer chamber 4 166 in direct communication with fiue or space 8 as indicated at 22, 5. Vihile we have here shown three combined gas purifying and reheating chambers, we do not confine ourselves thereto, as a greater or less number may be used, as may be found convenient or desirable; nor do We restrict our invention to the form and construction of said chambers herein disclosed, nor to entirely surrounding the same with a pure-gas space, although such construction is preferred.

As no claim is here made to the construction of'the washer, we have neither shown nor described it in detail, and we do not desire to limit ourselves in this regiird, as washers of variousconstructions may be used or the same may be dispensed with entirely, as above indicated.

The method herein disclosed of purifying and reheating blast-furnace gases is claimed in an application, Serial No. 229,477, filed "October 21, 1904.

We claim- 1. Apparatus of the character described having a settling-space adapted to receive impure heated gases, said space having a hob low wall, and a washer havin inlet com municating with the ass-settlin specs and its outlet communicating with the said hollow wall. 4

Apparatus of the character describz, 3, comprising a succession of communicating; gas-settling chambers constructed with communicating hollow walls, means for admitting heated impure gas to one of said chambers, and means for passin the gas urified in the chambers into and through t e hollow Walls thereof for the purpose of heating the pure gas.

3. Apparatus of the character described,

comprismg a plurality of communicating settling chambers having communicating hollow walls, means for admitting heated impure gas to the first of said chambers, a gas washer communicating with the last of said chambers and a connection between the diccharge of the gas-washer and the hollow wells of said chambers for the purpose of conductgas through 1 cor plurality of communicating settling-she ere he communicating holiow wells, a connection with the initial chamber for admitting impure gee thereto, a gaswssher communicating with the last of said chambers, 9.- connection between the disciiarge oi the gas-washer and the hollow walls of the c ambers for passing the purified latt and heatingthe same, tor e purified gas at the hoii-ow well of the imtiai and discharupper end 01 chamber.

5. Apparatus of the character described comprising a series of settling-chambers, each chamber being inclosed 03 a hollow wall, communicating connections between the chambers, communicating connections between the hollow-wall spaces, a gas-inlet for one of the settling-chambers, and means for admitting gas passing from said chembers into the said hollow-wail s aces.

Apparatus cf the c iaracter described comprising a series of relatively large settling-chambers each constructed with a hollow wall, communicating connections between the chambers, communicating connections between the hollow walls of adjacent cha'mberss gss-inlet connection for thefirst of the series of chambers, means for passing gas discharged from the last of the series of chambers into the hollow-wall space of that chamber, and a gas-outlet for the hollow-wall space cf the initisi chamber.

7. Anparatus of the characterdescribed ng e series of separate settling-chamconstructed with e hollow inclosing cemmunicating connections between the chambers, communicating connections between the wall-spaces of the chambers, a gesinlet for the initial chamber and a gasontlet for the hollow-wall space of that 

